html,body,svg { height:100% }
by tinyhustlee
HTML
<!-- Learn about this code on MDN: https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/clip-path -->
<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg">
<clipPath id="myClip" clipPathUnits="objectBoundingBox">
<circle cx=".5" cy=".5" r=".5" />
</clipPath>
<!-- Top-left: Apply a custom defined clipping path -->
<rect x="1" y="1" width="8" height="8" stroke="green"
clip-path="url(#myClip)" />
</svg>
CSS
html,body,svg { height:100% }